Day1 csf java

Editor's Notes

• #5: Java Version History: J2SE 1.2 (December 8, 1998) J2SE 1.3 (May 8, 2000) J2SE 1.4 (February 6, 2002) J2SE 5.0 (September 30, 2004) Java SE 6 (December 11, 2006) Java SE 7 (July 28, 2011) Java SE 8 (March 18, 2014) The heart of the Java platform is the concept of a "virtual machine" that executes Java bytecode programs. This bytecode is the same no matter what hardware or operating system the program is running under. There is a JIT (Just In Time) compiler within the Java Virtual Machine, or JVM. The JIT compiler translates the Java bytecode into native processor instructions at run-time and caches the native code in memory during execution. The Java platform is a suite of programs that facilitate developing and running programs written in the Java programming language. The platform is not specific to any one processor or operating system, rather an execution engine (called a virtual machine) and a compiler with a set of libraries are implemented for various hardware and operating systems so that Java programs can run identically on all of them. There are multiple platforms, each targeting a different class of devices: Java Card: A technology that allows small Java-based applications (applets) to be run securely on smart cards and similar small-memory devices. Java ME (Micro Edition): Specifies several different sets of libraries (known as profiles) for devices with limited storage, display, and power capacities. Often used to develop applications for mobile devices, PDAs, TV set-top boxes, and printers. Java SE (Standard Edition): For general-purpose use on desktop PCs, servers and similar devices. Java EE (Enterprise Edition): Java SE plus various APIs useful for multi-tier client–server enterprise applications.Java platform consists of Java language compiler, libraries and Runtime environment.
• #8: Initial Level - Oracle Certified Associate Pro Level - Oracle Certified Professional Master Level - Oracle Certified Master